Device for creating a variety of visual images
US4948241A · kind A · utility
5Cited by
16References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Mar 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for creating a variety of visual images includes a pyramidal body which defines a cavity having three identical triangular walls intersecting each other at an angle of 90.degree.. The pyramidal body is provided with an uninterrupted reflective coating. A grease-type pencil or crayon, templates and various objects are provided for the creation of an infinite variety of visual images therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.